Fiber Bragg grating ultrasonic sensors based on intensity modulation technique

被引：1
|
作者：
Tanaka, Satoshi [1 ]
机构：
[1] Natl Def Acad, Dept Commun Engn, Yokosuka, Kanagawa 2398686, Japan
来源：
FIFTH ASIA-PACIFIC OPTICAL SENSORS CONFERENCE | 2015年 / 9655卷
关键词：
strain and temperature measurement; cascaded chirped long period fiber grating; channeled spectrum; Fourier transform; cross correlaton; VIBRATION SENSOR; INCOHERENT-LIGHT; MULTIWAVELENGTH; LASER;
D O I：
10.1117/12.2186693
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Intensity modulation technique is an attractive interrogation method for fiber-optic ultrasonic sensors using fiber Bragg gratings (FBGs), in which FBG modulates the intensity of reflected (or transmitted) narrowband light with a wavelength tuned to the slope of the FBG reflection (or transmission) spectrum curve if the vibration or acoustic wave is applied to the FBG and the intensity detection enables the direct observation of their waveforms. In this paper, principles of the intensity-based FBG ultrasonic sensors and their applications to vibration and underwater acoustic wave sensors are presented.
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页数：4
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